By Tanner Garrity Human beings may have removed themselves from the food chain millions of years ago, but the nervous system never really got the memo. It still functions as if we’re fighting (or fleeing) for our lives in a dangerous savanna or jungle, engaging the sympathetic nervous system whenever we’re confronted with a stressor, no matter how minor the situation may compare to being eaten alive. There’s a reason you can literally feel stress ahead of a high-stakes meeting, intimidating workout class or daunting conversation with a significant other. Your body catalyzes a chain of commensu…